According to the NFTA bus schedule, I think Bus 79 operates between the Transit Station at Main and Niagra in Tonowanda to downtown Niagra Falls. Check under "Schedules" at NFTA.com
Enjoy your stay! We are about 10 miles south of you at Beaver Island State Park. Plenty of transient slips here in a nice park with a beach and golf course if you decide to take a trip down the river. $25 per night incl electric.